The PZ-2000 XYZ stage has been specifically designed to provide a high resolution, and highly repeatable, means of controlling the X, Y, and Z position of the microscope stage. The XY axes derive their precise control through the use of closed-loop DC servomotors employing high-resolution rotary encoders for positioning feedback. By using closed-loop control for the stage position, there is no chance that the stage will become lost, as can occur with open-loop micro-stepped stages after a number of moves and direction changes. The XY stage utilizes crossed-roller slides, high-precision lead screws, and zero-backlash miniature geared DC servomotors for smooth and accurate motion. The top plate of the stage accepts standard K-size slide inserts that are available for any sample, i.e., slides, petrie dishes, multi-well plates, etc. The slide insert is moved in the Z-axis via a piezo element with a range of 150 µm with nanometer accuracy (300 µm & 500 µm range is also available). By moving the sample in the Z-plane, any objective can be used, eliminating twisting wires or needed spacers as required when a piezo element is put onto a single objective. The microprocessor-controlled MS-2000 control unit provides for RS-232 and USB communication with a host computer for control of the XYZ axis.
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Features
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Closed-loop control of the X, Y, and Z-axes for precise positioning and highly repeatable focusing
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Wide dynamic speed range with adjustable trapezoidal move profiles
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Smooth adjustable dual-range joystick control
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Backlit LCD display shows X, Y, and Z coordinates
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"Zero" and "Home" button for simple stand-alone operations
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Compact ergonomic tabletop control unit size is 6?D x 9?W x 3?H (9 x 23 x 16½ cm). Rack mount controller with stand-alone joystick is also available.
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Proven operation with many popular software packages
XY specifications for standard configuration
| XY axis range of travel |
120 mm x 110 mm |
| XY axis resolution (encoder step) |
0.088 µm |
| XY axis lead screw accuracy |
0.25 µ/mm |
| XY axis RMS repeatability |
< 0.7 µm |
| XY axis maximum velocity |
7 mm/sec |
ADEPT piezo controller specifications
| Specification |
PZ-2150 |
PZ-2300 |
PZ-2500 |
| Piezo Travel Range (+/- 5%) |
150 µm |
300 µm |
500 µm |
| Piezo smallest move / resolution* |
2.2 nm |
4.5 nm |
7.6 nm |
| Maximum Load for full range travel |
2Kg |
1Kg |
1Kg |
| Transient Response time** |
11 - 15 ms |
| External Analog input (BNC) |
0 to 10 Volts |
| Maximum Input Frequency |
20 Hz |
| Maximum Continuous Output Current |
13 mA |
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**Time taken to travel 10%-90% for moves below 30% travel range with 600 grams load.
*In external input mode, use of a higher bit DAC will increase resolution. For example a 0-10 analog voltage from the DAC results in the following:
| PZ-2150 |
| External Analog input |
Steps |
Resolution |
| 16 Bit DAC |
65536 |
2.2 nm |
| 17 Bit DAC |
131075 |
1.1 nm |
| 18 Bit DAC |
262144 |
0.55 nm |
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PZ-2000 options
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XY axes Linear Encoders for high-accuracy positioning. Linear encoder resolution is 10 nm, with a scale accuracy of 0.3 µm per 10mm and 3 µm per 100mm. Positioning resolution at sample is < 50 nm.
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Auto Focus (requires NTSC or PAL composite video signal).
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ASI's proven line of Z-axis drives can also be added to the fine focus shaft of the microscope to provide Z-axis positioning with a resolution of 50 nm throughout the range of the microscope's travel. The piezo unit can then be used for fast and accurate Z-axis positioning to any point within the range of travel.
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Other lead screw pitches are available for faster XY translation, or for more precise positioning when using standard rotary encoders.
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